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Finding the Fourth Proportional to 551,138.20, 825,920.10 and 313,979.80

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Solution

The fourth proportional to 551,138.20, 825,920.10 and 313,979.80 is: 470,521.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,138.20 : 825,920.10 = 313,979.80 : x
  2. Step 2: Convert to fraction form
    551,138.20/825,920.10 = 313,979.80/x
  3. Step 3: Cross multiply
    551,138.20x = 825,920.10 × 313,979.80
  4. Step 4: Simplify right side
    551,138.20x = 259,322,227,813.98
  5. Step 5: Solve for x
    x = 259,322,227,813.98/551,138.20
  6. Step 6: Final answer
    x = 470,521.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.